Sizing your scope has a lot more to do with how close you may be shooting than your longest shot possibilities. Just about any scope from 2x on up will do the job on deer size game out to well past 200 yards. Heck, 1x is good enough at 200 yards. But even scopes with as little as 4x on the bottom can be a real nightmare if you encounter something in the timber at 25 yards. If you may have close in or fast moving shots I'd look hard at the 1.5-4x's and go no bigger than 2-7x.